source/core/texture1d.cpp

   1 #include <msp/core/raii.h>
   2 #include <msp/gl/extensions/arb_direct_state_access.h>
   3 #include <msp/gl/extensions/arb_texture_storage.h>
   4 #include <msp/gl/extensions/msp_texture1d.h>
   5 #include "error.h"
   6 #include "texture1d.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 Texture1D::Texture1D():
  14         Texture(GL_TEXTURE_1D),
  15         width(0),
  16         allocated(0)
  17 {
  18         static Require _req(MSP_texture1D);
  19 }
  20
  21 void Texture1D::storage(PixelFormat fmt, unsigned wd, unsigned lv)
  22 {
  23         if(width>0)
  24         {
  25                 if(fmt!=format || wd!=width || (lv && lv!=levels))
  26                         throw incompatible_data("Texture1D::storage");
  27                 return;
  28         }
  29         if(wd==0)
  30                 throw invalid_argument("Texture1D::storage");
  31
  32         set_format(fmt);
  33         width = wd;
  34         levels = get_n_levels();
  35         if(lv)
  36                 levels = min(levels, lv);
  37 }
  38
  39 void Texture1D::allocate(unsigned level)
  40 {
  41         if(width==0)
  42                 throw invalid_operation("Texture1D::allocate");
  43         if(level>=levels)
  44                 throw invalid_argument("Texture1D::allocate");
  45
  46         bool direct = ARB_texture_storage && ARB_direct_state_access;
  47         if(!direct)
  48         {
  49                 glActiveTexture(GL_TEXTURE0);
  50                 glBindTexture(target, id);
  51         }
  52
  53         allocate_(level);
  54
  55         if(!direct)
  56                 glBindTexture(target, 0);
  57 }
  58
  59 void Texture1D::allocate_(unsigned level)
  60 {
  61         if(allocated&(1<<level))
  62                 return;
  63
  64         if(ARB_texture_storage)
  65         {
  66                 GLenum fmt = get_gl_pixelformat(storage_fmt);
  67                 if(ARB_direct_state_access)
  68                         glTextureStorage1D(id, levels, fmt, width);
  69                 else
  70                         glTexStorage1D(target, levels, fmt, width);
  71                 apply_swizzle();
  72                 allocated |= (1<<levels)-1;
  73         }
  74         else
  75                 image_(level, 0);
  76 }
  77
  78 void Texture1D::image(unsigned level, const void *data)
  79 {
  80         if(width==0)
  81                 throw invalid_operation("Texture1D::image");
  82         if(level>=levels)
  83                 throw out_of_range("Texture1D::image");
  84
  85         if(ARB_texture_storage)
  86                 return sub_image(level, 0, get_level_size(level), data);
  87
  88         glActiveTexture(GL_TEXTURE0);
  89         glBindTexture(target, id);
  90
  91         image_(level, data);
  92
  93         if(auto_gen_mipmap && level==0)
  94         {
  95                 generate_mipmap_();
  96                 allocated |= (1<<levels)-1;
  97         }
  98
  99         glBindTexture(target, 0);
 100 }
 101
 102 void Texture1D::image_(unsigned level, const void *data)
 103 {
 104         if(!allocated)
 105         {
 106                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
 107                 apply_swizzle();
 108         }
 109
 110         GLenum fmt = get_gl_pixelformat(storage_fmt);
 111         GLenum comp = get_gl_components(get_components(storage_fmt));
 112         GLenum type = get_gl_type(get_component_type(storage_fmt));
 113         glTexImage1D(target, level, fmt, get_level_size(level), 0, comp, type, data);
 114
 115         allocated |= 1<<level;
 116 }
 117
 118 void Texture1D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
 119 {
 120         if(comp!=get_components(format) || type!=get_component_type(format))
 121                 throw incompatible_data("Texture1D::image");
 122         image(level, data);
 123 }
 124
 125 void Texture1D::sub_image(unsigned level, int x, unsigned wd, const void *data)
 126 {
 127         if(width==0)
 128                 throw invalid_operation("Texture1D::sub_image");
 129         if(level>=levels)
 130                 throw out_of_range("Texture1D::sub_image");
 131
 132         bool direct = (ARB_direct_state_access && (ARB_texture_storage || (allocated&(1<<level))));
 133         if(!direct)
 134         {
 135                 glActiveTexture(GL_TEXTURE0);
 136                 glBindTexture(target, id);
 137         }
 138
 139         allocate_(level);
 140
 141         GLenum comp = get_gl_components(get_components(storage_fmt));
 142         GLenum type = get_gl_type(get_component_type(storage_fmt));
 143         if(ARB_direct_state_access)
 144                 glTextureSubImage1D(id, level, x, wd, comp, type, data);
 145         else
 146                 glTexSubImage1D(target, level, x, wd, comp, type, data);
 147
 148         if(auto_gen_mipmap && level==0)
 149                 generate_mipmap_();
 150
 151         if(!direct)
 152                 glBindTexture(target, 0);
 153 }
 154
 155 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelComponents comp, DataType type, const void *data)
 156 {
 157         if(comp!=get_components(format) || type!=get_component_type(format))
 158                 throw incompatible_data("Texture1D::sub_image");
 159         sub_image(level, x, wd, data);
 160 }
 161
 162 void Texture1D::image(const Graphics::Image &img, unsigned lv)
 163 {
 164         if(img.get_height()!=1)
 165                 throw incompatible_data("Texture1D::image");
 166
 167         unsigned w = img.get_width();
 168         PixelFormat fmt = pixelformat_from_image(img);
 169         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
 170
 171         image(0, img.get_pixels());
 172 }
 173
 174 unsigned Texture1D::get_n_levels() const
 175 {
 176         unsigned n = 0;
 177         for(unsigned s=width; s; s>>=1, ++n) ;
 178         return n;
 179 }
 180
 181 unsigned Texture1D::get_level_size(unsigned level) const
 182 {
 183         return width>>level;
 184 }
 185
 186 UInt64 Texture1D::get_data_size() const
 187 {
 188         return id ? width*get_pixel_size(storage_fmt) : 0;
 189 }
 190
 191
 192 Texture1D::Loader::Loader(Texture1D &t):
 193         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 194 {
 195         init();
 196 }
 197
 198 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 199         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 200 {
 201         init();
 202 }
 203
 204 void Texture1D::Loader::init()
 205 {
 206         add("raw_data", &Loader::raw_data);
 207         add("storage", &Loader::storage);
 208         add("storage", &Loader::storage_levels);
 209 }
 210
 211 void Texture1D::Loader::raw_data(const string &data)
 212 {
 213         obj.image(0, data.data());
 214 }
 215
 216 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 217 {
 218         obj.storage(fmt, w);
 219 }
 220
 221 void Texture1D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned l)
 222 {
 223         obj.storage(fmt, w, l);
 224 }
 225
 226 } // namespace GL
 227 } // namespace Msp